public class Example4_10 {
   public static void main(String args[]) {
       L.下底=100;     //Lader的字节码被加载到内存,通过类名操作类变量
       L lOne=new L();
       L lTwo=new L();
       lOne.设置上底(28);
       lTwo.设置上底(66);
       System.out.println("laderOne的上底:"+lOne.获取上底());
       System.out.println("laderOne的下底:"+lOne.获取下底());
       System.out.println("laderTwo的上底:"+lTwo.获取上底());
       System.out.println("laderTwo的下底:"+lTwo.获取下底());
    }
}
